<!-- math question -->
      <div class="col-sm-6">
        <div class="classmath"> 
             <h4 class="text-center ">ចំលើយ/Anwser</h4>
        </div>
         <div id="question">
         <div class="line line-dashed clear-both"></div>
            

            
         </div>

      </div>
	   <!-- END math question -->